I think it depends how you want to repair it, whether with another metal ferrule, a spigot, or an external fiberglass sleeve, and whether you want to remove and rewrap guides in the process. And some of that depends on how much of the blank is broken away, and whether from the tip section or butt section.

But it sounds to me like, if you are asking, you already feel that you won't be happy with a quicky repair, so the first thing I would do is think on it while looking for a Fenwick yellow (or possibly the similar color Lami) as a source of repair stock. In the process, you may be surprised to find a NOS Fenwick yellow, already sleeve-ferruled, comparable blank and just build a new one exactly to your liking. Then you might be more satisfied with a make-do repair on the old one as a good back-up.

Or as Majicwrench mentioned in a current discussion on a broken Fenwick, sometimes you get to kind likin' the old warhorses. Another way to put it, if you don't have one or two old hounds in the kennel, you haven't got a kennel.

Fix it with whatever you can find. Stent does not need to be very long, an inch + on each side of break will do it.

Wonder why it broke? That is not usual glass behavior

I think it has something to do with the fact that I replaced the original Sizematic ferrule with one of the same ID but about a centimeter shorter on the female ferrule. Maybe the heat did something to it (mild heat gun? wouldn't think so) or maybe the original builder had sanded down a ferrule station and not realized it would break much easier.

I already did. Graphite from that Encounter. JB Weld, have not wrapped over it yet but it is cured. I asked because I kind of wanted to keep it American but hey, one Chinese part won't hurt it, I guess. I had a broken section of Sage Flight that I was gonna use, but cut off the part of the taper that fit inside the glass too short.

Well, thank you for your input. Wish I had thought of that. The stent seems secure; if it breaks again I will try your method. Welcome to the forum! Good place to polish up your English.